We stayed for 4 days in Nattavut's condo and we really loved the experience. The apartment is really clean and comfortable, with all the amenities you could need (tv, microwave, stove, washing machine, drier, iron board + iron...). Moreover, in the 18th floor you can enjoy a small gym and a great swimming pool, ideal to refresh yourself after a long day of walking and to enjoy a magnificent view of Bangkok's night.
The neighborhood, Ari, is also lovely, safe and peaceful, without too many tourists and full of food stands and nice restaurants.
Totally recommended!